Just place it on book and read， easy and convenient， One turning operation， adjustable brightness.Perfect for stylish reading in bed， travel， study， etc， Long work life， low power consumption.Compact 14.8 x 17.6 cm size fits any paperbacks. 50 hours of light on three AAA batteries.Dimension: 148 x 176 mm (L x W).For International Shipping to USA， it takes 15-30 business days (2-4 weeks) for delivery depending on your location. Most of the items will be delivered in 2.5 - 3 weeks， while some may take up to 4 weeks.